TROPICS (Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats)[5] is a 2023 NASA constellation of six small satellites, 3U CubeSats, that will measure temperature and moisture profiles and precipitation in tropical systems with unprecedented temporal frequency.

This data will enable scientists to study the dynamic processes that occur in the inner core of the storm resulting in rapid genesis and intensification.

[12] TROPICS will consist of six 3U size CubeSats, each about 10 × 10 × 36 cm (3.9 × 3.9 × 14.2 in) and weighing just 5.34 kg (11.8 lb),[13] that use scanning microwave radiometers to measure temperature, humidity, precipitation and cloud properties.

[7] The CubeSats will be launched into three separate orbital planes to enable the overall constellation to monitor changes in tropical cyclones as frequently as every 21 minutes.

The Astra Rocket 3.3 vehicle (serial number LV0010) carrying two TROPICS CubeSats for TROPICS-1 mission failed to reach orbit and the satellites were lost.